Public Member Functions | List of all members
Gudhi::cech_complex::Cech_complex< Kernel, SimplicialComplexForCechComplex > Class Template Reference
Čech complex

Cech complex class. More...

#include <include/gudhi/Cech_complex.h>

Public Member Functions

template<typename InputPointRange >
 Cech_complex (const InputPointRange &points, Filtration_value max_radius, const bool exact=false)
 Cech_complex constructor from a range of points. More...
 
void create_complex (SimplicialComplexForCechComplex &complex, int dim_max)
 Initializes the simplicial complex from the proximity graph and expands it until a given maximal dimension, using the Cech blocker oracle. More...
 
Filtration_value max_radius () const
 
const Point_d & get_point (Vertex_handle vertex) const
 
std::vector< Sphere > & get_cache ()
 
const bool is_exact ()
 Check exact option. More...
 

Detailed Description

template<typename Kernel, typename SimplicialComplexForCechComplex>
class Gudhi::cech_complex::Cech_complex< Kernel, SimplicialComplexForCechComplex >

Cech complex class.

Cech complex is a simplicial complex where the set of all simplices is filtered by the radius of their minimal enclosing ball and bounded by the given max_radius.

Template Parameters
KernelCGAL kernel: either Epick_d or Epeck_d.
SimplicialComplexForCechComplexfurnishes Vertex_handle and Filtration_value type definition required by Gudhi::Proximity_graph and Cech blocker.
Examples
cech_complex_example_from_points.cpp, and cech_persistence.cpp.

Constructor & Destructor Documentation

◆ Cech_complex()

template<typename Kernel , typename SimplicialComplexForCechComplex >
template<typename InputPointRange >
Gudhi::cech_complex::Cech_complex< Kernel, SimplicialComplexForCechComplex >::Cech_complex ( const InputPointRange &  points,
Filtration_value  max_radius,
const bool  exact = false 
)
inline

Cech_complex constructor from a range of points.

Parameters
[in]pointsRange of points where each point is defined as kernel::Point_d.
[in]max_radiusMaximal radius value.
[in]exactExact filtration values computation. Not exact if Kernel is not CGAL::Epeck_d. Default is false.

Member Function Documentation

◆ create_complex()

template<typename Kernel , typename SimplicialComplexForCechComplex >
void Gudhi::cech_complex::Cech_complex< Kernel, SimplicialComplexForCechComplex >::create_complex ( SimplicialComplexForCechComplex &  complex,
int  dim_max 
)
inline

Initializes the simplicial complex from the proximity graph and expands it until a given maximal dimension, using the Cech blocker oracle.

Parameters
[in]complexSimplicialComplexForCech to be created.
[in]dim_maxgraph expansion until this given maximal dimension.
Exceptions
std::invalid_argumentIn debug mode, if `complex.num_vertices()` does not return 0.

◆ get_cache()

template<typename Kernel , typename SimplicialComplexForCechComplex >
std::vector< Sphere > & Gudhi::cech_complex::Cech_complex< Kernel, SimplicialComplexForCechComplex >::get_cache ( )
inline
Returns
Vector of cached spheres.

◆ get_point()

template<typename Kernel , typename SimplicialComplexForCechComplex >
const Point_d & Gudhi::cech_complex::Cech_complex< Kernel, SimplicialComplexForCechComplex >::get_point ( Vertex_handle  vertex) const
inline
Parameters
[in]vertexPoint position in the range.
Returns
The point.

◆ is_exact()

template<typename Kernel , typename SimplicialComplexForCechComplex >
const bool Gudhi::cech_complex::Cech_complex< Kernel, SimplicialComplexForCechComplex >::is_exact ( )
inline

Check exact option.

Returns
Exact option.

◆ max_radius()

template<typename Kernel , typename SimplicialComplexForCechComplex >
Filtration_value Gudhi::cech_complex::Cech_complex< Kernel, SimplicialComplexForCechComplex >::max_radius ( ) const
inline
Returns
max_radius value given at construction.
The documentation for this class was generated from the following file: